Saw-setting tool



, C 2 f i oct. 16,1923. 1,470,694

J. E. MEI-:D

SAW SETTING TOOL Filed March l0 1921 2 Sheets-Sheet 1 lllll g .1m E

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Sil- F Oct. 16, 1923.

Patented @et i6, 192.3.,

UNITED stares saw-SETTING Toor..

application filed March 1o, 1921. serial No. 451,255,

To all '2c/720m may concern.

Beit known that I, Jaures E. Munn, a citir/icn of the United. States, residing at Palestine7 in the county of `Wirt and State of Vest Virginia, have invented new and useful lmprovements in Saw-Setting Tools, of which the following yis a specification.

This invention relates to saw setting tools and has for its primary object to providea hand operated tool of such construction that the operation of setting saw `teeth is greatly simplified and whereby all of the teeth of th saw are setat uniform angles.

A further object of the invention is to provide a saw set of such character that it may he easily operated by anyone, and wherein the teeth will be properly set at the desired angle without the exercise of special skill or knowledge.` i

A further object is to provide a tool of the character stated wherein adjustment of the device maybe quickly and easily made so as to incline the teeth at any desired angle.

A still further object of theinvention is to provide a saw set ot' that character wherein an automatically operating hammer is employed for delivering a blow to the `saw teeth. and wherein means of an improved nature is utilized vfor Vvarying the pressure of the hammer blow, thus compensating for saws having thick or thin teeth.

A. still further object is to provide a saw set of the character stated further featured by improved means for adjusting the mechanism to time the blow of the hammer.

lVith these and other objects in view, the invention consists of the features of construction. combination and arrangement of parts, hereinafter i fully described and claimed. reference being had to the accom# panying drawings,` in which i Figure 1 is a side elevation of a saw set constructed in accordance with the invention, part of the casing being removed to show certain parts of the underlying structure, i

Figure 2 is a front elevation of the improved saw set, a part thereof being broken away, i i

Figure 3 is a central longitudinal sectional view taken through the improved saw set,`

Figure 4 is a fragmentary top plan View showing in detail the means employedfor automatically adjusting the saw relative to the anvil,

Figure 5 is a bottom plan viewof the device shown in Figure et, the adjusting shaft being shown'insectionV i Figure 6 is anenlarged transverse sectional view talren on line 6 6 of Figure 1,

Figure 7 is a transversesectional View taken on line 7%7 of Figure 8, and i j 1Figurey 8 is a detail perspective view of the anvil. I y

Referring'nowmore particularly to the dravf'ings, 9 indicates the maincasing for the saw setting tool. made of suitable light metal and the main portion thereof is shapedy So aSto adapt itself to the hand of the tool operator, and is provided at its upper end with a forwardly projecting barrel portion 10. One

yside of casing 9 and a part'of the barrel 10 thereof is closed by a removable plate 11,

the latter properly housingthevmechanism j of the tool and by reason of the same being removable, access to such mechanism` may be had should repairs or adjustment of the parts makeit necessary. y

The outer end of barrel 10 carries a hous- PATENT OFFICE. i

Thiszcasing may be i ing or support 12 which receives.` anvil 13,

against which the saw teeth' are driven in thesetting` operation.` The side of the housing y or support 12 is recessed as at 14 to permit of the cutting edge of the saw being applied to the anvil.

y f The anvil 18 comprises a polygonal rotatable body as shown7 the various sides of which are adapted to be brought into opera! tive position with relation to the sawy and the blow delivering mechanism of the tool, in

order that the proper and desired langularity` may be given to the teeth of the saw with which. the set is used. The polygonal surfaces are indicated at 15, and are of such breadth as to properly supporta portionof the saw body adjacent the cut-ting edge thereof, and the said surfaces of the set are so cut or shaped as to enable the saw teeth to bend at the proper place. regardless of the length of the said teeth. The surfaces 15y are therefore cut away or beveled inwardly near their upper edges as at 16. andit will be understood that the beveled surfaces may be vary-` ing in lengths in order that the teeth of vari-` ous types of saws may be accommodated and set. To facilitate adjustment ofther` anvil, the various faces of the anvil may be numbered or letteredas at 17 The body 13 ofthe anvil is secure-d to the j longitudinally adjustable shank 18 threaded as at V19 into the casing or housing l2, the upper end` of the said shank is suitably' mounted in the bearing 20, and washers 21 carried by the said shaft maintain the anvil in proper position thereon. By this construction it is obvious that rotation of the shaft will enable the various surfaces of the anvil body to be brought into proper position for the accommodation of the saw blade, and the said anvilwill be raised or lowered according to the direction of movement imparted to the screwv shank. The lower end of this shank is equipped with a head 22 to facilitate its manipulation bythe lingers.

In order that the anvil may be iirmly held in its various positions of adjustments, the same is provided upon its under surface with notches or recesses 23 to receive the upper end of locking pin 24 carried lby the casing. Thisv pin is normally held seated in the recesses or notches by means of the leaf spring 25.

Themeansl for forming or shaping the teeth. of the saw, blade against the adjacent surface of the anvil comprises a plunger indicated 'at 26. This plunger is mounted for reciprocation within the hollow-barrel portion l of the tool, and is shaped at its for ward or operative end as shown so as to properly engage the teeth of the saw blade indicated at 27,` The plunger is so disposed orarranged within theibarrel as to deliver its pressure uponthe saw tooth normally above the juncture of the beveled faces 16 with the flat faces l5 of the anvil. However, lthe position of contact may be accurately adjusted'by manipulation ofthe screw shank 18 supporting the anvil.

lThe body or casingl 9 of the tool is provided near its forward face wi'th'a lever 28, the latter being pivotedv wit-hin the body as at29. f This lever conforms to the shape of the fingers as the hand clenches the tool, and

" is retracted or moved inwardly upon its pivot as the grip of 'the hand is tightened. As the grip is relaxed, however, the lever moves outwardly or forwardly under impulse of expansion spring interposed between the said lever and the body or casing 9. The upper extremity of this lever is headed as at 3l and this head lits within a recess 32 at the rear end of plunger 26. It is obvious, therefore, that as the lever 28 moves inwardlyr or rearwardly, Athe plunger 26l will be advanced or moved toward the anviland as the lever 28 moves outwardly, the saidplunger will be retracted.

Thetool is provided with an auxiliary plunger 33, thesame underlying plunger 26 and movable with the latter, tho function of plunger 83 being to engage the saw blade belowrthe juncture of the yteeth therewith simultaneously with or just prior to engage mentjof the plunger 26 with the said teeth.

Lacrosse This auxiliary plunger 83, therefore, acts as a holding member for the saw during the setting stroke of the tool. The rear end of plunger 33 is provided with a recess 34 to receive head 85 carried by an upwardly ez;- tending resilient arm 86 carried by lever 28. The particular construction of the plungers and the manner in which they are connected with the operating lever 28 causes both plungers to be advanced or moved forwardly simultaneously with the retraction of lever 28, yet plunger 26 will be permitted to have slight longitudinal movement relative to plunger 33. v

The means for delivering the setting blow to the plunger 26 comprises a hammer indicatedat 37. This hammer is pivoted at its lower end as at 38 within the casing 9 and in such position that the hammer face 39 thereof contacts the rear end of plunger 26. The hammer 37 is driven forward by leaf spring 40, the'latter engaging at its upper end with notch 4l in the rear edge of the hammer body above the pivot 38 thereof. The lower end ofthis leaf spring extends downwardly through Ithe body or casing 9 and is seated in an adjustable block 42 near the lower end of said casing. This block travels in guides 48 disposed longitudinally of the bodyy 9, and the lower end of the said block is engaged by lever 44 pivoted at one end as at 45 within the said casing, The outer end of the lever is rounded and internally threaded to receive the threaded shank 46 rotatably mounted within the said casing and provided at its lower end with a milled wheel 47, to facilitate manipulation of the threaded member with the fingers. Tt will be observed that 'this wheel 47 is disposed upon the exterior of the casing, and it is obvious that the tension of spring 40 may-be increased or diminished accordingly' i as the threaded shank 46 is rotated. This particular mechanism enables the degree of spring pressure applied to the hammer to be accurately controlled.

The means for causing the hammer head to be cocked or retracted against the pressure of spring 40, lso as to tension the latter, includes a link 48 pivoted as at 49 intermediate its ends to a lever 50 pivoted at one end as aty 5l within the casing 9. The upper end of link 48 has pivotallyl secured thereto a pawl 52 adapted to engage at its outer end'behind a shoulder or notch 58 in the lower edge of hammer 87, and this pawl is held yieldably engaged with the adjacent edge of the hammer by a leaf spring 54. The lower end of link 48 is pivotally connected at its lower end as at 55 to the rear end of a bar or connecting member 56; the latter eX-l tending through an aperture in the forward face of casing 9 and being connected as at 57 to lever 28.

rlhe rear end of lever 50 is rounded and internally threaded so as to receive the upper end of screw shank 58. `This screw shank has its lower end projecting through casing 9 and provided with a finger grip 59, and while being capable of rotating free1y,jis held by washer 60 against longitudinal movement. By this construction it is obvious that adjustment of link 48 toward -or away from hammer head 37 may be easily and quickly made, and this adjustment determines the timing of the hammer operations.

The saw settingtool is equipped with mechanism of an improved nature for automatically adjusting the saw relative to the tool as the latter is manipulated. This mechanism is actuated by the` plunger 33 and is arranged upon the barrel of the tool adjacent to the toothed edge of the saw. ll'lorc particularly, this mechanism includes a shaft 61 mounted at its ends in suitable bearings 62 in a casing 63 mounted upon the outer end of the barrel and overlying the plunger and anvil mechanisms. This shaft or rod 61 is disposed transversely of the barrel and is disposed adjacent to the cutting edge of the saw within slot or recess 14. The shaft has adjustably secured thereon a. bracket 64 carrying a pair of pawls 65 adapted to engage with the upwardly extending teeth of the saw 27. The shaft is also equipped with spring clips 66, one arranged upon each side of bracket 64, to receivev and maintain either or both of pawls 65 when the latter are raised. j In practice. one of the pawls `65 only will 'be engaged with the saw teeth, depending upon the direction it is desired to have the saw travel during operation ofthe tool, and at such time the other pawl 65 will loe raised and held b-y clamp 66. The bracket 64 is maintained in adjusted positions upon shaft 61 by set screws 67, the latter extending through a slot 63 in casing 63 so that the saine may be manipulated without gaining access to the interior of said casing.

The casing or housing 63 confines a pair ot' hell-crank levers 69--70I the forward ends of which project through suitable openings or slots in shaft 61, said slots being disposed equidistant from the center of the shaft. It will be observed, particularly with reference to Figure 4L ofthe drawings, that the bell-cranks 69-70 are `disposed opposite to each other, the lower arms 7l of said levers projecting toward each other near the longitudinal axis of the barrel of the tool. These shortarms 71 of the bellcrank levers are to be engaged one at a time with the forward end of a link 72 connected at its rear end to a` pin 73 extending upwardly from and movable with plunger 33. Pin 73 extends through an elongated opening 74 in the plunger 26 which overlies plunger 33. Link 72 is engaged with the short arms 7 of bell-cranks 691-70 by ineansof a pin 75 having a finger grip 7 6 at the upper end thereof, the said pin extending through a slot 77 in casing 63. By so.

constructing the device, the pin 75 may be moved upwardly to disengage itself with one of the short `armsy 71 of the bell-cranks and the link may be readily moved laterally so that the pin 75 thereof maybe alined with the opening at the inner end of the next adjacent bell-crank lever arm 71, whereupon said pin may be engaged within said opening to establish connection between the said bell-crank lever and the said link. This construction enables thev direction of operative movement of shaft 61 to be reversed when desired or required. i

In operation, the anvil is adjusted so that the proper face 15 thereof at the desired elevation will be` presented to the saw edge,k

and the feed mechanism isfadjustedso as to cause the saw to be fed in the proper direction through the slot or channel 14 at the outer end of the barrel. It will be understood that after the anvil is adjusted it will beheld rigidly in position by means of the locking pin 24. Vhen the tool has been applied to the saw by causing thelatter to `enter channel or slot 14 with the saw tooth thereof resting against the anvil, the lever 28 is retracted by contracting the hand. This movement of the lever at once starts plungers 26 and 33 moving forwardly. rllhe plunger 33 engages the saw below the base of the tooth thereof and presses it firmly against the adjacent face 15 of the anvilf `During this movement, pin 73 movingfor.- wardly causes link 72 to similarly travel whereby the bell-crank lever with which it is attached will 4be caused to mover shaft 61 in one direction. This movement of the shaft, causes itsoperative pawl to play `or idle over saw tooth, and it will be understood that after plunger 26 has operated to engage a saw tooth7 and. both plungers 26 and are being retracted by expansion of spring 30, the operative pawl-65 of the lifter mechanism will engage with a tooth of the `saw and cause the saw and saw set to move relatively to each other a distance equal to one saw tooth. It will be observed, particularly with/reference to Figure 3 of the drawings, that the opening 32 in plunger 26 is slightly larger than head 31, whereby slight play between the head and plunger is permitted. When initial movement is given to lever 28. head 31 willimove to the forward edge of recess 32, thus permitting the'said plnnoer to move a slight distance still fur`- ther forwardly after advancing movement of head 31 has ceased. As'lever 23 moves rearwardly, arm 56 `causes link i8 to rock upon its pivot 49, giving forward movemeut to the upper end of said link. The forward. movement of said yend of the link develops rearward rotary movement inhammer 37'by means of pawl 52. This rearward movement of the head continues until. just prior to the time lever 28 reaches its rearmost movement, whereupon the riding of pawl 52 upon the eccentric projection 78 at the lower end of hammer head 3T causes the said pawl to be disengaged at its forward end from shoulder 53 of the hammer, whereupon the latter is released to the action of spring 40. The hammer at once moves forwardly under impulse of the said spring which has been tensioned by cooking of the hammer head, and the blow delivered by hammer face 39 against the rear end of plunger 26 causes the latter to move forward sharply, engaging the tooth of saw 27 and forcing the same against the inclined face 16 adjacent thereto. Should it happen that the blow delivered lacks force Asufficient to flatten the tooth against the said inclined face, the power or tension of spring may be increased by moving block 42 upwardly. This movement or adjustment is accomplished by manipulation of finger grip 47 of threaded shank 46, as has been above detailed.` Relaxation of the grip upon the lever 28 enables the latter, by impulse of spring 30t'o assume normal or extended position, and heads 35 and 32 will cause plungers 33 and 26 to be retracted. Simultaneously with said retraction, the saw feeding mechanism will be caused to operate in the manner above described. As plunger 26 moves rearwardly so does the hammer 37 until the shoulder 53 thereof assumes normal position. As lever 28 moves forwar lly the upper end of link 48 is retracted, causing pawl 52 to slide rearwardly and to drop inbehind shoulder 53.l rlhe mechanism is thus'res'et for the next operation. Adjustment of the link 48 within the casing 9 by manipulation of hand wheel 59 will govern the time of dropping of trigger or pawl 52, as will be obvious.

From the foregoing it is obvious that l have provided a saw setting tool ,of comparatively simple construction and thoroughly capable of performing the functions' forwhich it is designed. rll'he various parts of the mechanism are of such construction and assemblage as to minimize friction and to overcome as far as possible wear, breakage or derangement. As the various movable parts of the mechanism are securely housed within the tool there is little or no danger of the same becoming disordered by being tampered with, and there should be little or no necessity for removing the cover of the casing, except occasionally for oiling or .cleaning purposes.

lllhile the foregoing is a description of the invention in its preferred embodiment, it is obvious that the invention is not necessarily restricted thereto, as changes in the makeup, proportion and assemblage of parts may be resorted to without departing from the invent-ion as defined by the claims.

n Having thus fully described my invention, claim 1. in a saw setting tool, a plunger for operating upon the teeth of the saw, a rotatable anvil disposed in the path of said plunger, said anvil having a plurality of surfaces adapted one at a time to be presented to said plunger. said surfaces being graduated so as to vary the angle of the saw tooth pressed against said surface by said plunger, means for rotating and-simultaneously vertically adjusting said anvil, and means for holding said anvil fixed against rotation and vertical movement in itsV various positions of adjustment.

2. ln a saw setting tool, an anvil, said anvil being of polygonal shape and adapted to have its various surfaces presented one at a time ,to the saw tooth to be operated upon. a rotatable shaft supporting said anvil, said shaft being mounted in a thread ed bearing so that exact adjustment of said anvil may be made, a locking pin to engage with said anvil to hold the latter in adjusted positions, and a spring engaging said pin and normally holding the latter in engageinent'with said anvil. Y Y

3. ln a saw setting tool, a casing, abarrel communicating with said casing. a plunger moving longitudinally in said barrel, means for reciprocating said plunger.` an anvil arranged in the path of said plunger, and a support for the anvil mounted on said barrel, said support being operative for rotating said anvil and also adjusting the same transversely to the axis of said barrel.

4. In a. saw setting ltool. a casing, an anvil, a plunger mounted for reciprocation in said casing and toward and away from said anvil, an auxiliary plunger movable simultaneously with the said first-named plunger, and means whereby the firstnamed plunger may have greater longitudinal movement in one direction'than said auxiliary plunger.

5. In a saw setting tool. a casing, al barrel communicating with said casing, an anvil arranged at the mouth of said casing and adapted to have the toothed edge of a saw disposed against the same, a plunger movable toward and away from said anvil, an auxiliary plunger movable toward and away from said anvil, said auxiliary plunger adapted to engage said saw beyond the cutting teeth thereof and to press said saw against said anvil, means for moving said plungers, and hammer mechanism in said casing adapted to deliver a blow to said nist-named plunger after the auxiliary plunger has been brought into contact with the saw.

6. In a saw setting tool, an anvil, a plunger movable toward or away from said anvil, a lever for moving said plunger a predetermined distance on its working stroke, a. hammer for delivering a blow to said plunger', spring means for moving said hammer in one direction. means governed by the movement ot said lever in one direction for retracting said hammer against said spring means, and trigger mecha` nisni` operable when the plunger has moved such predetermined distance on its werking stroke t'or releasing said hammer to the action ot said spring means.

7. 1n a saw setting tool, a casing, a barrel communicating with said casing, an anvil disposed at the mouth of said barrel, a plunger in said barrel movable toward and away from said anvil, a lever carried by said casing and connected to said plunger for moving the latter in both directions, a hammer in said casing to deliver a blow to the rear end ofsaid plunger, a spring for forcing said hammer in one direction, trigger mechanism in said casing for cocking said hammer when the plunger is advanced, and means operable when the plunger is moved a. predetermined distance for releasing said hammer to the action of said spring. i

8. In a saw setting tool, a casing, a plun ger movable within said casing, a lever pivoted to said casing and connected with said plunger to move the latter, a hammer in said casing adapted todeliver a blow to the rear end ot said plunger. a. spring to force said hammer in one direction, a link in said casing, link and engaged with said hammer. a connec-tion between said link and said lever whereby retraction of the latter will cause said pawl to retract said hammer, and a cam tace on said hammer to engage said pawl and move the same out ot Contact with the hammer when the latter has been retracted a predetermined distance.

9. in a saw setting tool, a casing, a plunger carried by the casing, a lever pivoted to the casing and connected to said plunger for moving the latter, a hammer pivoted in said casing adjacent the rear end ot said plunger, a spring normally forcing said hammer into engagement with said plunger, a shoulder on said hammer. a link pivoted intermediate its ends within said casing, a. pawl carried by one end ot. said link and normally engaged with said shoulder, an arm connecting said lever with the opposite end of .said link whereby retraction ot the lever will torce said pawl against the shoulder of said hammer, and a cam on said hammer adapted when the lever has reached a predetermined degree oit rotation to force said pawl from engagement with said shoulder, whereby said hammer will be released to the action of said spring.

a pawl carried by said 10. In a saw setting tool, a. casing, a plunger movable within said casing, the said plunger having a notrh therein, a lever pivoted te said casing, a head carried by said lever and engaged in said notch, said head being` of smaller size than said notch, aha-mmer in said casing adapted to deliver a blow to said plunger, means for forcing said hammer in the direction or" said plunger, and means governed by the movement of said lever a predetermined distance in one direction to release said hammer' to the action ot said forcing means.

1l.. 1n a saw setting tool, an anvil, a setting plunger movable toward and away trom said anvil, an auxiliary plunger movable toward and away from said anvil, a lever, a resilient member connecting said auxiliary plunger with said lever, a rigid member connecting said lever with said setting plunger, and means governed by the movement of said setting plunger a predetermined distance tor delivering a blow to the said setting plunger.

12. ln a saw setting tool, a casing, a plunger mounted for reciprocation within said casing, a hammer to deliver a blow to e said plunger, a shoulder on said hammer, an arm pivoted within said casing, a link pivoted intermediate its ends to said arm,

a pawl carried by one end of said link and engaged with Said shoulder, a cam on said hammer to disengage said pawl from said shoulder when saidhammer has been retracted a predetermined distance, means tor rocking said link, and means for adjusting said arm toward or away from said hammer. n

13. In a saw setting tool, a plunger, a pivoted hammer, said hammer adapted to ydeliver a blow to said plunger, a spring engagedat one end with the rear of said hammer, a movable block, the opposite end of said springy being seated in 'said block, a pivoted arm, the said pivoted arm supporting said block, and means'tor swinging said arm upon its pivotal support whereby said block may be moved toward or away from said hammer.

14. In a saw setting tool, a reciprocating plunger adapted to operate upon the teeth ot' a saw, a shaft slidable transverse to the,

direction of movement oi said plunger, a bracket secured to said shaft, pawls pivoted to said bracket and adapted one at a time to be moved into engagement with the teeth or' the saw, a pair of oppositely disposed bell-crank levers having their forwardly projecting arms engaged with said shaft, a tink connected with the plunger at one end, and means whereby theopposite end of said link may be connected with either of the rear arms of said bell-crank levers.

In testimony whereof I afiX my signature.

JAMES E. MEED. 

